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ircu2/ircd/m_list.c

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/*
* IRC - Internet Relay Chat, ircd/m_list.c
* Copyright (C) 1990 Jarkko Oikarinen and
* University of Oulu, Computing Center
*
* See file AUTHORS in IRC package for additional names of
* the programmers.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 1, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: m_list.c 1841 2007-11-05 03:01:34Z entrope $
*/
/*
* m_functions execute protocol messages on this server:
*
* cptr is always NON-NULL, pointing to a *LOCAL* client
* structure (with an open socket connected!). This
* identifies the physical socket where the message
* originated (or which caused the m_function to be
* executed--some m_functions may call others...).
*
* sptr is the source of the message, defined by the
* prefix part of the message if present. If not
* or prefix not found, then sptr==cptr.
*
* (!IsServer(cptr)) => (cptr == sptr), because
* prefixes are taken *only* from servers...
*
* (IsServer(cptr))
* (sptr == cptr) => the message didn't
* have the prefix.
*
* (sptr != cptr && IsServer(sptr) means
* the prefix specified servername. (?)
*
* (sptr != cptr && !IsServer(sptr) means
* that message originated from a remote
* user (not local).
*
* combining
*
* (!IsServer(sptr)) means that, sptr can safely
* taken as defining the target structure of the
* message in this server.
*
* *Always* true (if 'parse' and others are working correct):
*
* 1) sptr->from == cptr (note: cptr->from == cptr)
*
* 2) MyConnect(sptr) <=> sptr == cptr (e.g. sptr
* *cannot* be a local connection, unless it's
* actually cptr!). [MyConnect(x) should probably
* be defined as (x == x->from) --msa ]
*
* parc number of variable parameter strings (if zero,
* parv is allowed to be NULL)
*
* parv a NULL terminated list of parameter pointers,
*
* parv[0], sender (prefix string), if not present
* this points to an empty string.
* parv[1]...parv[parc-1]
* pointers to additional parameters
* parv[parc] == NULL, *always*
*
* note: it is guaranteed that parv[0]..parv[parc-1] are all
* non-NULL pointers.
*/
#include "config.h"
#include "channel.h"
#include "client.h"
#include "hash.h"
#include "ircd.h"
#include "ircd_alloc.h"
#include "ircd_chattr.h"
#include "ircd_features.h"
#include "ircd_log.h"
#include "ircd_reply.h"
#include "ircd_string.h"
#include "msg.h"
#include "numeric.h"
#include "numnicks.h"
#include "s_bsd.h"
#include "s_conf.h"
#include "send.h"
/* #include <assert.h> -- Now using assert in ircd_log.h */
#include <stdlib.h>
#include <string.h>
#define LPARAM_ERROR -1
#define LPARAM_SUCCESS 0
#define LPARAM_CHANNEL 1
static struct ListingArgs la_init = {
2147483647, /* max_time */
0, /* min_time */
4294967295U, /* max_users */
0, /* min_users */
0, /* flags */
2147483647, /* max_topic_time */
0, /* min_topic_time */
0, /* bucket */
{0} /* wildcard */
};
static struct ListingArgs la_default = {
2147483647, /* max_time */
0, /* min_time */
4294967295U, /* max_users */
0, /* min_users */
0, /* flags */
2147483647, /* max_topic_time */
0, /* min_topic_time */
0, /* bucket */
{0} /* wildcard */
};
static int
show_usage(struct Client *sptr)
{
if (!sptr) { /* configuration file error... */
log_write(LS_CONFIG, L_ERROR, 0, "Invalid default list parameter");
return LPARAM_ERROR;
}
send_reply(sptr, RPL_LISTUSAGE,
"Usage: \002/QUOTE LIST\002 \037parameters\037");
send_reply(sptr, RPL_LISTUSAGE,
"Where \037parameters\037 is a space or comma separated "
"list of one or more of:");
send_reply(sptr, RPL_LISTUSAGE,
" \002<\002\037max_users\037 ; Show all channels with less "
"than \037max_users\037.");
send_reply(sptr, RPL_LISTUSAGE,
" \002>\002\037min_users\037 ; Show all channels with more "
"than \037min_users\037.");
send_reply(sptr, RPL_LISTUSAGE,
" \002C<\002\037max_minutes\037 ; Channels that exist less "
"than \037max_minutes\037.");
send_reply(sptr, RPL_LISTUSAGE,
" \002C>\002\037min_minutes\037 ; Channels that exist more "
"than \037min_minutes\037.");
send_reply(sptr, RPL_LISTUSAGE,
" \002T<\002\037max_minutes\037 ; Channels with a topic last "
"set less than \037max_minutes\037 ago.");
send_reply(sptr, RPL_LISTUSAGE,
" \002T>\002\037min_minutes\037 ; Channels with a topic last "
"set more than \037min_minutes\037 ago.");
send_reply(sptr, RPL_LISTUSAGE,
" \037pattern\037 ; Channels with names matching "
"\037pattern\037. ");
send_reply(sptr, RPL_LISTUSAGE,
" !\037pattern\037 ; Channels with names not "
"matching \037pattern\037. ");
send_reply(sptr, RPL_LISTUSAGE, "Note: Patterns may contain * and ?. "
"You may only give one pattern match constraint.");
if (IsAnOper(sptr))
send_reply(sptr, RPL_LISTUSAGE,
" \002S\002 ; Show secret channels.");
if (!feature_bool(FEAT_LIST_SHOWMODES_OPERONLY) || IsAnOper(sptr))
send_reply(sptr, RPL_LISTUSAGE,
" \002M\002 ; Show channel modes.");
send_reply(sptr, RPL_LISTUSAGE,
"Example: LIST <3,>1,C<10,T>0,#a* ; 2 users, younger than 10 "
"min., topic set., starts with #a");
return LPARAM_ERROR; /* return error condition */
}
static int
param_parse(struct Client *sptr, const char *param, struct ListingArgs *args,
int permit_chan)
{
int is_time = 0;
int is_equals = 0;
char dir;
unsigned int val;
char *tmp1, *tmp2;
assert(0 != args);
if (!param) /* NULL param == default--no list param */
return LPARAM_SUCCESS;
while (1) {
is_equals = 0;
switch (*param) {
case 'T':
case 't':
is_time++;
args->flags |= LISTARG_TOPICLIMITS;
/*FALLTHROUGH*/
case 'C':
case 'c':
is_time++;
param++;
if (*param != '<' && *param != '>')
return show_usage(sptr);
/*FALLTHROUGH*/
case '<':
case '>':
dir = *(param++);
if (*param == '=') {
param++;
is_equals = 1;
}
if (!IsDigit(*param)) /* must start with a digit */
return show_usage(sptr);
val = strtol(param, (char **)&param, 10); /* convert it... */
if (*param != ',' && *param != ' ' && *param != '\0') /* check syntax */
return show_usage(sptr);
if (is_time && val < 80000000) {
/* Convert age to timestamp and reverse direction */
val = TStime() - val * 60;
dir = (dir == '>') ? '<' : '>';
}
if (dir == '<')
val = val - (is_equals ? 0 : 1);
else
val = val + (is_equals ? 0 : 1);
switch (is_time) {
case 0: /* number of users on channel */
if (dir == '<')
args->max_users = val;
else
args->min_users = val;
break;
case 1: /* channel creation time */
if (dir == '<')
args->max_time = val;
else
args->min_time = val;
break;
case 2: /* channel topic */
if (dir == '<')
args->max_topic_time = val;
else
args->min_topic_time = val;
break;
}
break;
case 'S':
case 's':
if (!sptr || !IsAnOper(sptr) || !HasPriv(sptr, PRIV_LIST_CHAN))
return show_usage(sptr);
args->flags |= LISTARG_SHOWSECRET;
param++;
if (*param != ',' && *param != ' ' && *param != '\0') /* check syntax */
return show_usage(sptr);
break;
case 'M':
case 'm':
if (feature_bool(FEAT_LIST_SHOWMODES_OPERONLY) &&
(!sptr || !IsAnOper(sptr) || !HasPriv(sptr, PRIV_LIST_CHAN)))
return show_usage(sptr);
args->flags |= LISTARG_SHOWMODES;
param++;
if (*param != ',' && *param != ' ' && *param != '\0') /* check syntax */
return show_usage(sptr);
break;
default:
/* It might be a wildcard... */
if (strchr(param, '*') ||
strchr(param, '?'))
{
if (param[0] == '!')
{
param++;
args->flags |= LISTARG_NEGATEWILDCARD;
}
/* Only one wildcard allowed... */
if (args->wildcard[0] != 0)
return show_usage(sptr);
/* If its not going to match anything, don't bother. */
if (param[0] != '*' &&
param[0] != '?' &&
param[0] != '#' &&
param[0] != '&')
return show_usage(sptr);
tmp1 = strchr(param, ',');
tmp2 = strchr(param, ' ');
if (tmp2 && (!tmp1 || (tmp2 < tmp1)))
tmp1 = tmp2;
if (tmp1)
*tmp1++ = 0;
ircd_strncpy(args->wildcard, param, sizeof(args->wildcard));
if (tmp1 == NULL)
return LPARAM_SUCCESS;
param = tmp1;
continue;
}
/* channel name? */
if (!permit_chan || !IsChannelName(param))
return show_usage(sptr);
return LPARAM_CHANNEL;
}
if (!*param) /* hit end of string? */
break;
param++;
}
return LPARAM_SUCCESS;
}
void
list_set_default(void)
{
la_default = la_init; /* start off with a clean slate... */
if (param_parse(0, feature_str(FEAT_DEFAULT_LIST_PARAM), &la_default, 0) !=
LPARAM_SUCCESS)
la_default = la_init; /* recover from error by switching to default */
}
/*
* m_list - generic message handler
*
* parv[0] = sender prefix
* parv[1] = channel list or user/time limit
* parv[2...] = more user/time limits
*/
int m_list(struct Client* cptr, struct Client* sptr, int parc, char* parv[])
{
struct Channel *chptr;
char *name, *p = 0;
int show_channels = 0, param;
struct ListingArgs args;
if ((cli_firsttime(sptr) + feature_int(FEAT_LISTDELAY) > CurrentTime) && !IsOper(sptr)) {
if (!find_except_conf(sptr, EFLAG_LISTDELAY)) {
sendcmdto_one(&me, CMD_NOTICE, sptr, "%C :*** You have not been connected long enough to use /list. You must wait %d seconds before trying again.",
sptr, (cli_firsttime(sptr) + feature_int(FEAT_LISTDELAY)) - CurrentTime);
send_reply(sptr, RPL_LISTSTART);
send_reply(sptr, RPL_LISTEND);
return 0;
}
}
if (cli_listing(sptr)) /* Already listing ? */
{
if (cli_listing(sptr))
MyFree(cli_listing(sptr));
cli_listing(sptr) = 0;
send_reply(sptr, RPL_LISTEND);
update_write(sptr);
if (parc < 2 || 0 == ircd_strcmp("STOP", parv[1]))
return 0; /* Let LIST or LIST STOP abort a listing. */
}
if (parc < 2) /* No arguments given to /LIST ? */
args = la_default;
else {
args = la_init; /* initialize argument to blank slate */
for (param = 1; parv[param]; param++) { /* process each parameter */
switch (param_parse(sptr, parv[param], &args, parc == 2)) {
case LPARAM_ERROR: /* error encountered, usage already sent, return */
return 0;
case LPARAM_CHANNEL: /* show channel instead */
show_channels++;
break;
case LPARAM_SUCCESS: /* parse succeeded */
break;
}
}
}
send_reply(sptr, RPL_LISTSTART);
if (!show_channels)
{
if (args.max_users >= args.min_users && args.max_time >= args.min_time &&
args.max_topic_time >= args.min_topic_time) /* Sanity check */
{
cli_listing(sptr) = (struct ListingArgs*) MyMalloc(sizeof(struct ListingArgs));
assert(0 != cli_listing(sptr));
memcpy(cli_listing(sptr), &args, sizeof(struct ListingArgs));
list_next_channels(sptr);
return 0;
}
send_reply(sptr, RPL_LISTEND);
return 0;
}
for (; (name = ircd_strtok(&p, parv[1], ",")); parv[1] = 0)
{
chptr = FindChannel(name);
if (!chptr)
continue;
if (ShowChannel(sptr, chptr)
|| (IsAnOper(sptr) && HasPriv(sptr, PRIV_LIST_CHAN)))
send_reply(sptr, RPL_LIST, chptr->chname,
chptr->users - number_of_zombies(chptr), chptr->topic);
}
send_reply(sptr, RPL_LISTEND);
return 0;
}
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